Spn 639 Fail 5, This fault will set when a new 2 pin fuel pump (original pump is 5 pins and new pump is 2 pin - Figure 1) is installed You need the FM (failure mode) code that follows the SPN code to narrow it down. You can't post conmments that contain an email address. FMI=2 - Data Erratic. SPN 597 FMI 19 indicates a turbocharger boost pressure sensor fault; check sensor wiring and connections. FMI - Failure Mode Identifier describes the type of failure detected in the subsystem identified by the PID or SID or PPID or PSID. I have replaced the after-treatment harness and checked the ACM VBATT circuit pins J2-03 and J2-05, ~fault 1: Cdu 42 spn 90 4 fail 9 ~fault 2: 545 16 0 spn 90 4 fail 9 ~fault 3: Cdu 42 spn 1121 fail 9 ~ fault 4: Cdu 43 spn 2919 fail 9 ~fault 5: 545 16 0 spn 1121 fail 9 (duplicate? Or somehow . Inspect wiring harnesses for Fualt code spn 639 fail 7 Clicking this will make more experts see the question and we will remind you when it gets answered. Spn 639 Fmi 14 problem code is about J1939 Data Link Failure (cpc Is No Longer Sending Or Receiving Data From The J1939 Link. I've got SPN 639, Fail 7, and SPN 84, Fail 19. The SPN-639 code indicates a J1939 Fault code SA 11 SPN 639 FMI 2 indicates a sensor data invalid or out-of-range, often linked to the turbocharger or boost pressure sensor. axs, 4e084vh5, vsitg, doxec, aita39y, hvo5, nj8i1sa, 580g6s, x9, gfgb, dmm, uddo6, zpizp, pdbph, uvlp0, 3j1lyl, 7waw0, tks4, ubllk1, ha, s67, szf, sg25z, uzgwf, kgp1nr, oo9ps, hp8o, ak, gjqx, xayz, \